[SantagarBrax]

There are other synonyms and I think it's time to move on from sounding like a west coast teenager.

Virulent
Noxiuous
Malignant
Pestilential
Pernicious (Voted)
Venomous
Nocuous
Pathogenic
Calamitous

So pick your poison, just give it a try and you might like it.

Sincerely,

Everyone